I have a graph for which I need a reference line everywhere the mouse-cursor is inside this graph. And this reference line will follow the mouse movements inside the graph.
But this doesn't seems to work fine. It works only on the axis and the ticks (.axis lines) of the axis. On debugging, I found that mouse event works fine when applied over SVG but not on the group, why so ?
Here is my code :
test.html
<html>
<head>
<script src="jquery.js">
</script>
<script src="d3.v2.js">
</script>
<script src="retest.js">
</script>
<style type="text/css">
.g_main {
cursor:pointer;
}
.axis path, .axis line {
stroke: #DBDBDB;
/*shape-rendering: crispEdges;
*/
}
.y g:first-child text {
display:none;
}
.y g:first-child line {
stroke: #989898 ;
stroke-width: 2.5px;
}
/*.x g:first-child line {
stroke: black ;
stroke-width: 2.5px;
}
*/
.y path {
stroke: #989898 ;
stroke-width: 2.5px;
}
</style>
</head>
<body>
<center>
<button id="reload" onclick="loadViz();">
load Graph
</button>
<div id="viz" class="viz">
</div>
</center>
<script>
loadViz();
</script>
</body>
</html>
retest.js
var series,
classifications,
minVal,
maxVal,
svgW = 600,
svgH = 600,
//w = 1200,
//h = 1200,
vizPadding = {
top: 120,
right: 30,
bottom: 120,
left: 50
},
yAxMin_PA = 0,
yAxMax_PA = 50,
xAxMin_PA = 2002,
xAxMax_PA = 2008,
areaStrokeColors = ['#FF6600', '#3366FF', '#B8860B', '#458B00', 'white'];
var loadViz = function () {
color = d3.scale.category10();
data = {
"lines": [{
"line": [{
"X": 2002,
"Y": 42
}, {
"X": 2003,
"Y": 45
},
{
"X": 2005,
"Y": 47
},
{
"X": 2007,
"Y": 41
}
]
}, {
"line": [{
"X": 2003,
"Y": 33
}, {
"X": 2005,
"Y": 38
}, {
"Y": 36,
"X": 2008
}
]
}, {
"line": [{
"X": 2004,
"Y": 13
}, {
"X": 2005,
"Y": 19
}, {
"X": 2008,
"Y": 21
}
]
}, {
"line": [{
"X": 2003,
"Y": 20
}, {
"X": 2005,
"Y": 27
}, {
"X": 2008,
"Y": 29
}
]
}
]
};
$("#viz").html("");
buildBase();
//setScales();
};
var buildBase = function () {
margin = {
top: 80,
right: 120,
bottom: 40,
left: 40
},
width = 960 - margin.left - margin.right,
height = 550 - margin.top - margin.bottom;
t2 = height + margin.top + margin.bottom;
x = d3.scale.linear()
.domain([xAxMin_PA, xAxMax_PA])
.range([0, width]);
y = d3.scale.linear()
.domain([yAxMin_PA, yAxMax_PA])
.range([height, 0]);
tickSizeToApplyX = 5;
tickSizeToApplyY = 10;
// Function to draw X-axis
xAxis = d3.svg.axis()
.scale(x)
.ticks(tickSizeToApplyX)
.tickSize(-height, 0, 0)
//.tickSize(10)
.orient("bottom")
.tickPadding(5);
// Function to draw Y-axis
yAxis = d3.svg.axis()
.scale(y)
.ticks(tickSizeToApplyY)
.tickSize(-width, 0, 0)
//.tickSize(0)
.orient("left")
.tickPadding(5);
// Define the line
var valueline = d3.svg.line()
.x(function (d) { /*console.log(d.X);*/
return x(d.X);
})
.y(function (d) { /*console.log(d.Y);*/
return y(d.Y);
});
// Define the line
var referline = d3.svg.line()
.x(function (dx) { /*console.log(d.X);*/
return dx;
})
.y(function (dy) { /*console.log(d.Y);*/
return dy;
});
// Append SVG into the html
var viz = d3.select("#viz")
.append("svg")
.attr("width", width + margin.left + margin.right + 10)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("class", "g_main")
.attr("transform", "translate(" + margin.left + "," + ((margin.top) - 30) + ")");
viz.on("mousemove", function () {
cx = d3.mouse(this)[0];
cy = d3.mouse(this)[1];
console.log("xx=>" + cx + "yy=>" + cy);
redrawline(cx, cy);
})
.on("mouseover", function () {
d3.selectAll('.line_over').style("display", "block");
})
.on("mouseout", function () {
d3.selectAll('.line_over').style("display", "none");
});
//console.log(this);
viz.append("line")
//d3.select("svg").append("line")
.attr("class", 'line_over')
.attr("x1", 0)
.attr("y1", 0)
.attr("x2", x(xAxMax_PA))
.attr("y2", 0)
.style("stroke", "gray")
.attr("stroke-dasharray", ("5,5"))
.style("stroke-width", "1.5")
.style("display", "none");
// Draw X-axis
viz.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
// Draw Y-axis
viz.append("g")
.attr("class", function (d, i) {
return "y axis"
})
.call(yAxis);
function redrawline(cx, cy) {
d3.selectAll('.line_over')
.attr("x1", 0)
.attr("y1", cy)
.attr("x2", x(xAxMax_PA))
.attr("y2", cy)
.style("display", "block");
}
};
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